Results 211 to 220 of about 190,709 (268)

Analysis of Lewis number effects in flame spread

International Journal of Heat and Mass Transfer, 1993
De Ris's formulation of the problem of flame spread over thin and thick solid fuel surfaces is extended to include the influence of nonunity Lewis numbers of oxidant and fuel vapors. A zeroth order formula for the flame spread velocity is deduced. To this order of approximation, the Lewis number of the oxidant affects the spread rate only through its ...
J.B. Greenberg, P.D. Ronney
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Lewis number effects on turbulent burning velocity

Symposium (International) on Combustion, 1985
Experimental values of turbulent burning velocities for propane, hydrogen and iso-octane mixtures with air are reported under conditions of high turbulence and high turbulent Reynolds number. The measurements were made by the double kernel method during explosions in a fan-stirred bomb, with four fans, capable of speeds of up to 10,000 rpm.
R.G. Abdel-Gayed, D. Bradley, M.N. Hamid, M. Lawes   +3 more
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Anomalous lewis number effects in tribrachial flames

Symposium (International) on Combustion, 1989
Tribrachial (three-armed) flames are generated when a premixed flame propagates into a nonuniform mixture, and consist of a fuel-rich branch joined to a fuel-lean branch, with a diffusion flame trailing from the junction (the stoichiometric point). They are important in the context of ‘laminar flamelet’ models of turbulent non-premixed flames.
J. Buckmaster, M. Matalon
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Lewis-number effects on edge-flame propagation

Journal of Fluid Mechanics, 2002
Activation-energy asymptotics is employed to explore effects of the Lewis number, the ratio of thermal to fuel diffusivity, in a one-dimensional model of steady motion of edges of reaction sheets. The propagation velocity of the edge is obtained as a function of the relevant Damköhler number, the ratio of the diffusion time to the chemical time ...
Nayagam, Vedha, Williams, F. A.
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Effects of Lewis Number on Scalar Variance Transport in Premixed Flames

Flow, Turbulence and Combustion, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chakraborty, Nilanjan, Swaminathan, Nedunchezian   +1 more
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Effects of Chemical Reaction on Gas Properties and Lewis Number

ARS Journal, 1962
Criteria for the maximum effect of chemical reaction on thermal properties such as heat capacity, thermal conductivity, and coefficient of thermal expansion of interest in heat transfer processes are examined for gaseous systems of the type where a single equilibrium reaction between reactants and products occurs.
STEPHEN S. T. FAN, DAVID M. MASON
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Lewis Number Effect on Smoldering Combustion of a Thin Solid

Combustion Science and Technology, 2014
This article presents a simple model to describe the smoldering combustion of a thin solid burning in a narrow gap. Smoldering front under such a condition is unstable because of a similar instability mechanism to gaseous premixed combustion and produces a fingering pattern.
Kazunori Kuwana, Genichiro Kushida, Yosuke Uchida   +2 more
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The effect of Lewis number on radiative extinction and flamelet modeling

International Journal of Heat and Mass Transfer, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Effects of Lewis number on the burning intensity of Bunsen flames

Combustion and Flame, 1987
Abstract Effects of Lewis number on the burning intensity of Bunsen flames have been elucidated for various combinations of fuel/inert gasoxygen systematically, paying attention to the effects of transport properties of the mixture such as thermal diffusivity and mass diffusivity.
M. Mizomoto, H. Yoshida
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Effects of fuel Lewis number on flame spread over solids

Proceedings of the Combustion Institute, 2005
Abstract Using a detailed two-dimensional numerical model, a systematic investigation has been made to study the effect of fuel Lewis number (Le F  =  α /D F ) and mass transfer on flame spread over thin solids. The fuel Lewis number affects the flame spread rates for both concurrent and opposed flames over thin fuels.
Kevin Tolejko, Ioan I. Feier, James S. T’ien   +2 more
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